The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 1978
Filed:
May. 10, 1977
Jean Luc Ploix, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
An electrophoretic device defining a fluid tight assembled container filled with a suspension of solid electrically charged particles. Two outer plates of the container are provided with electrodes and part of the inner walls of the container and electrodes are coated with an electret layer that is a layer of dielectric material carrying permanent electrical charges. The electret layer coating one of the outer plates may be removable in order to allow the transfer of the solid electrically charged particles between different electrophoretic media. One of the outer plate may be either transparent allowing thus a presentation of data. The permanent electrical charges of the electret layer introduce a voltage treshold into the control of migration of the suspended particles in the electrophoretic medium.